Java usage (#221)
Java usage (#221)

* Improve java usage docs

Signed-off-by: Ryan Michela <5f622005e631946478b3bd36a050c97af440edc9@salesforce.com>

* Gradle usage

Signed-off-by: Ryan Michela <5f622005e631946478b3bd36a050c97af440edc9@salesforce.com>

envoyproxy/protoc-gen-validate,envoyproxy/protoc-gen-validate,envoyproxy/protoc-gen-validate,envoyproxy/protoc-gen-validate,envoyproxy/protoc-gen-validate